III. Thinking as the Instrument of Knowledge

For everyone, however, who has the ability to observe thinking, and with goodwill every normal man has this ability, this observation is the most important he can make. For he observes something which he himself produces. He is not confronted by what is, to begin with, a foreign object, but by his own activity. He knows how that which he observes comes to be. He perceives clearly its connections and relations. He has gained a firm point from which he can, with well-founded hopes, seek an explanation of the other phenomena of the world.